建造中金属油罐在风荷载作用下的屈曲

通常按考虑最终形状方法设计壳体结构,因此,需假定结构满足稳定性要求。但是,中等风力作用下金属油罐频繁倒塌,这引起了高度重视。介绍了发生在阿根廷巴塔哥尼亚的中等风力作用下在建油罐倒塌的分析研究。虽以点焊方式固定油罐的圆筒部分,但倒塌时顶部移位。为了解倒塌机理,建立倒塌尽可能符合实际的壳体结构模型,进行了几何非线性有限元静力分析。结果表明,因为倒塌时存在风速,只能通过结构的一些特性即焊接的局部性、与底板连接的不充分性解释倒塌机理。

Wind Buckling of Metal Tanks during Their Construction

Shell structures are usually designed by considering their final shape and configuration, so that it is assumed that stability during the construction will be satisfied without further thought. However, evidence from recent collapses of metal tanks under moderate winds shows that this is a matter that requires special attention. This paper reports analytical studies of tanks for the oil industry that failed during their construction in the Argentinean Patagonia under moderate winds. The cylindrical part of ...